try this
1) Make sure the directory is C:\Unreal2 as that is what it is programmed for
2) in \Textures, delete cubemaps.utx and cubemapst.utx
3) make two copies of Detail.utx and rename them to the above files
4) make two new directories, \Updates\Textures and \DISK1\Textures
5) copy the entire contents of the \Textures directory into both the new directories
6) go to the \Maps directory, and associate the maps with unreal.exe in the \system directory
7) only a few of the maps work, so double-click on the maps names to run them.
found using the search button... try that next time